Improvement in steam-boilers



a' steam-boiler,

" "from the furnace to the opposite l The furnace and lto the end ofthe` boiler by b'olts f', so as tobe easily attached or removed.

" t 4by,water-pipesrunning!doin the ends of thelformr ynnwanninvans, or NORTH roNAwANDaNnw Yoan.

Letters Patent No. 112,328, daad naar, 1871.

IMPROVEMENT'IN STEAM-Bomans.

Y ,'I'flxe Schedule referred to h1 these Letters Patent and making part of ille'mame.V

-. I, EDWARD EvANs, of' North -Tonawandznin the county oi'rNiagara` and State of New York, 'have l invented` certanilmproveinents in Steam-Boilers, of `whichfthe followingis a specilcation. l

The invention consists-,V

First, in the construction and arrangementof the furnace` and the surroundingwater-jacket with the smoke-chamber, ,and infront of the boiler proper,

itcan be detached therefrom without disturbing any Vof the main parts of theboiler.

` Second, in the arrangement, withthe direct flue of oftransverse pipes, arranged in rows across `the saine, with amanspace between each two` rows, and inan-holes in the top of the inner shell, through `which `access `is had `to said spaces for repairing `or replacingfthe water-pipes.

" .In theaccompanying drawing-` Figure I is sectionalfelevation of a boiler; provided with my improvements.' ,p

Figure II is a cross-sectionyin line :u x, Fig. I.

, Figure IIL is across-section in line y y, Fig. I.

Like letter'sdesignatelike parts ineach of the figures. t l is the outside 4shell of" a cylindrical boiler;

.A `is .an innershell, forming a direct due, B,

p end of the boiler;

` x O C are small returnfilues, arranged in thewaterspace around and above the shell AJ 4D is the smokecharnber; Aand El, `the chimney.

" `All `oi" these yparts `are fconstructed in theordiuary i manner.

` r `The former is Y constrilcted independent o`- the boiler,"is. closed by asuitable door, g.

Jacket are, preferably,.'attached means of 'danges j' and and projectsin 'front thereof, as repre- `Coinrnunications are formed between the jacket F;

. Tliejachet may alsofbeconhected to the boilll `soconnecting it` to the latter that` lare arranged -side by side, in rows,

, is the furnace, provided with a water-jacket, F;

and p l i .G,the lire-grate.` l

`boiler proper enables the feed-water in a cold state to to the tube-sheet ble manner.

As willAbe seenl from` Figs. 'l and Il, the smokechamber', intowhichlead the return-dues O, is arranged as a saddle inclosing the rear portion of the furnaceor water-jacket thereof', and subjects that portion oi' the outer shell .surrounded thereby to the heat of the said smoke-chamber, utilizing thesame, and increasing the heating-'surface oi' the boiler, the base of' the smoke-chimney the boiler and ter-jacket. The object of this water-jacket is to receive the heat which, in theold manner of arranging such boilers, is absorbed by the brick-work ofthe furnace, thereby adding a considerable amount of very eiective heating-surface to the bole 1 As it is easily detached from the boiler, repairs of the same can be made with great facility without disturbingjthe parts ofthe boiler proper, as is necesof the boiler, or in any other. suitapartly to the. outer shell of the Wasarily the case when the furnace is arranged in the usual manner.

crosswise ofthe inner shell or direct-flue B. They lying in vertical planes across the ueqthe pipes of one row or series being inclined in (one direction,7 at an angle of about forty-five degrees from the horizon, while the pipes of thenuext succeeding Vrow are inclined in an opposite direction at the same angle, so as to cross the plane ofthe other at right angles, or nearly so, after the manner of lattice-work, and as clearly repre-` sented..

. 'lbe pipes of each alternate-row or series being arranged in the same relative' manner, square spaces or lines extending the whole length of the boiler, will be formed between the pipes, for the unimpeded passage of the products of combustion. VBetween each two rows or sets of pipes a space, B', Fig. I, is left of sulcient width to allow a man to work therein in repairing, cleaning, or replacing the pipes, as `the same may become necessary.

Access to these spaces vis had through man-holes,

p, formed in the top of the inner shell A, the intel rior of 4the mainl shell being reached in the usual way.

The arrangement of these inclined watenpipes adds a great amount of very veffective heating-surface to boilers without increasing th'e size or necessitating a chan ge intheir general construction, while the inclination of the pipes insuresa free circulation ofthe wa# ter throughout the boiler. TheV arrangement of the furnace in front of the being partly attached to be admitted into the water-jacket, in which it becomes properly heated before it enters the main boiler, thereby dispensing with the se of a separate heater. This permits a direct escape of the exhaust into the open air, While the admission of cold Water into the water-jacket keeps' the latter comparatively cool, thereby protecting in a corresponding degree the inner shell thereof from the action of the heat of the furnace.

What I claim is 1. The. furnace F and water-jacket F', arranged with the smoke-chamber D, and in front of the main boiler or boiler proper, as' hereinbefore set forth.

2. The arrangement, with the direct-flue B and man-holes p, ofthe transverse Water-pipes H H, with a space, B', left between each two rows of pipes, as hereinbefore shown and described. A

EDWARD EVANS.

Witnesses:

EDWARD WILHELM, JN0. J. BONNER. 

